[Follow-up due to metal-on-metal hip implants].

Area of Science:

• Orthopedic surgery
• Biomaterials science
• Medical device safety

Background:

• Metal-on-metal (MoM) hip implants are used in arthroplasty.
• Approximately 2,000 patients in Sweden require follow-up for MoM hip implants.
• These implants pose risks of complications like elevated metal ion levels and adverse local tissue reactions (e.g., pseudotumors).

Purpose of the Study:

• To identify and summarize the risks associated with metal-on-metal hip implants.
• To highlight the need for active follow-up for patients with these devices.

Main Methods:

• Review of patient data and implant-related complications.
• Identification of risk factors associated with adverse outcomes.

Main Results:

• Patients with MoM hip implants are at risk of complications.
• Elevated metal ion levels and pseudotumors are significant concerns.
• Risk factors include female sex, suboptimal implant selection, and smaller femoral heads in resurfacing arthroplasties.

Conclusions:

• Active follow-up is crucial for the ~2,000 patients in Sweden with MoM hip implants.
• Understanding risk factors is essential for managing patients and preventing complications.
• Further research may be needed to optimize management strategies for MoM hip implant patients.